/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/automizer/mcr/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-McrAutomaton-WP.epf -i ../../../trunk/examples/svcomp/pthread/triangular-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-bf4350c [2020-09-17 14:53:53,822 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-17 14:53:53,827 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-17 14:53:53,876 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-17 14:53:53,876 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-17 14:53:53,889 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-17 14:53:53,891 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-17 14:53:53,894 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-17 14:53:53,897 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-17 14:53:53,899 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-17 14:53:53,900 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-17 14:53:53,901 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-17 14:53:53,901 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-17 14:53:53,902 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-17 14:53:53,903 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-17 14:53:53,905 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-17 14:53:53,906 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-17 14:53:53,907 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-17 14:53:53,908 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-17 14:53:53,910 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-17 14:53:53,912 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-17 14:53:53,913 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-17 14:53:53,917 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-17 14:53:53,918 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-17 14:53:53,921 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-17 14:53:53,921 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-17 14:53:53,921 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-17 14:53:53,922 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-17 14:53:53,923 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-17 14:53:53,924 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-17 14:53:53,924 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-17 14:53:53,925 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-17 14:53:53,926 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-17 14:53:53,927 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-17 14:53:53,928 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-17 14:53:53,928 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-17 14:53:53,929 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-17 14:53:53,929 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-17 14:53:53,929 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-17 14:53:53,930 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-17 14:53:53,931 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-17 14:53:53,932 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/mcr/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-McrAutomaton-WP.epf [2020-09-17 14:53:53,958 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-17 14:53:53,958 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-17 14:53:53,959 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-17 14:53:53,960 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-17 14:53:53,960 INFO L138 SettingsManager]: * Use SBE=true [2020-09-17 14:53:53,960 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-17 14:53:53,960 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-17 14:53:53,961 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-17 14:53:53,961 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-17 14:53:53,961 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-17 14:53:53,961 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-17 14:53:53,961 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-17 14:53:53,962 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-17 14:53:53,962 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-17 14:53:53,962 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-17 14:53:53,962 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-17 14:53:53,963 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-17 14:53:53,963 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-17 14:53:53,963 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-17 14:53:53,963 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-17 14:53:53,963 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-17 14:53:53,964 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-17 14:53:53,964 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-17 14:53:53,964 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2020-09-17 14:53:53,964 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-17 14:53:53,964 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-17 14:53:53,965 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-17 14:53:53,965 INFO L138 SettingsManager]: * Override the interpolant automaton setting of the refinement strategy=true [2020-09-17 14:53:53,965 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=VARIABLE_BASED_MOVER_CHECK [2020-09-17 14:53:53,965 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-17 14:53:53,965 INFO L138 SettingsManager]: * Interpolant automaton=MCR [2020-09-17 14:53:54,416 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-17 14:53:54,437 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-17 14:53:54,441 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-17 14:53:54,443 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-17 14:53:54,443 INFO L275 PluginConnector]: CDTParser initialized [2020-09-17 14:53:54,445 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/triangular-1.i [2020-09-17 14:53:54,537 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/510e621c0/754bf6e8182a4dc4b4634c7f23e1684f/FLAGb25cec1c4 [2020-09-17 14:53:55,200 INFO L306 CDTParser]: Found 1 translation units. [2020-09-17 14:53:55,203 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/triangular-1.i [2020-09-17 14:53:55,228 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/510e621c0/754bf6e8182a4dc4b4634c7f23e1684f/FLAGb25cec1c4 [2020-09-17 14:53:55,443 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/510e621c0/754bf6e8182a4dc4b4634c7f23e1684f [2020-09-17 14:53:55,457 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-17 14:53:55,464 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-09-17 14:53:55,465 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-17 14:53:55,465 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-17 14:53:55,470 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-17 14:53:55,471 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.09 02:53:55" (1/1) ... [2020-09-17 14:53:55,476 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3a4d061d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 02:53:55, skipping insertion in model container [2020-09-17 14:53:55,476 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.09 02:53:55" (1/1) ... [2020-09-17 14:53:55,486 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-17 14:53:55,540 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-17 14:53:56,131 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-17 14:53:56,148 INFO L203 MainTranslator]: Completed pre-run [2020-09-17 14:53:56,223 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-17 14:53:56,314 INFO L208 MainTranslator]: Completed translation [2020-09-17 14:53:56,316 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 02:53:56 WrapperNode [2020-09-17 14:53:56,317 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-17 14:53:56,318 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-09-17 14:53:56,318 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-09-17 14:53:56,318 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-09-17 14:53:56,330 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 02:53:56" (1/1) ... [2020-09-17 14:53:56,351 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 02:53:56" (1/1) ... [2020-09-17 14:53:56,378 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-09-17 14:53:56,379 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-17 14:53:56,379 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-17 14:53:56,379 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-17 14:53:56,389 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 02:53:56" (1/1) ... [2020-09-17 14:53:56,390 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 02:53:56" (1/1) ... [2020-09-17 14:53:56,392 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 02:53:56" (1/1) ... [2020-09-17 14:53:56,393 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 02:53:56" (1/1) ... [2020-09-17 14:53:56,399 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 02:53:56" (1/1) ... [2020-09-17 14:53:56,406 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 02:53:56" (1/1) ... [2020-09-17 14:53:56,411 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 02:53:56" (1/1) ... [2020-09-17 14:53:56,417 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-17 14:53:56,418 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-17 14:53:56,418 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-17 14:53:56,418 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-17 14:53:56,420 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 02:53:56" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-17 14:53:56,505 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2020-09-17 14:53:56,505 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2020-09-17 14:53:56,505 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2020-09-17 14:53:56,505 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2020-09-17 14:53:56,506 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-09-17 14:53:56,506 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2020-09-17 14:53:56,506 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-09-17 14:53:56,506 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-17 14:53:56,507 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2020-09-17 14:53:56,507 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-17 14:53:56,507 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-17 14:53:56,509 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2020-09-17 14:53:56,882 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-17 14:53:56,882 INFO L298 CfgBuilder]: Removed 6 assume(true) statements. [2020-09-17 14:53:56,889 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.09 02:53:56 BoogieIcfgContainer [2020-09-17 14:53:56,890 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-17 14:53:56,892 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-17 14:53:56,892 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-17 14:53:56,896 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-17 14:53:56,897 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.09 02:53:55" (1/3) ... [2020-09-17 14:53:56,898 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@16abc630 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.09 02:53:56, skipping insertion in model container [2020-09-17 14:53:56,899 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 02:53:56" (2/3) ... [2020-09-17 14:53:56,899 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@16abc630 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.09 02:53:56, skipping insertion in model container [2020-09-17 14:53:56,899 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.09 02:53:56" (3/3) ... [2020-09-17 14:53:56,902 INFO L109 eAbstractionObserver]: Analyzing ICFG triangular-1.i [2020-09-17 14:53:56,917 WARN L146 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2020-09-17 14:53:56,918 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-17 14:53:56,930 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-17 14:53:56,931 INFO L340 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-09-17 14:53:56,967 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 14:53:56,967 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 14:53:56,968 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 14:53:56,968 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 14:53:56,969 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 14:53:56,969 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 14:53:56,969 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 14:53:56,970 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 14:53:56,970 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 14:53:56,970 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 14:53:56,971 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 14:53:56,971 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 14:53:56,971 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 14:53:56,972 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 14:53:56,972 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 14:53:56,972 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 14:53:56,973 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 14:53:56,973 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 14:53:56,973 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 14:53:56,974 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 14:53:56,974 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 14:53:56,974 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 14:53:56,975 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 14:53:56,975 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 14:53:56,976 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 14:53:56,976 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 14:53:56,976 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 14:53:56,977 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 14:53:56,982 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 14:53:56,983 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 14:53:56,983 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 14:53:56,983 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 14:53:56,984 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 14:53:56,984 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 14:53:57,002 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 14:53:57,002 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 14:53:57,002 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 14:53:57,003 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 14:53:57,003 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 14:53:57,003 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 14:53:57,035 INFO L251 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2020-09-17 14:53:57,062 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-17 14:53:57,063 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-17 14:53:57,063 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-17 14:53:57,063 INFO L378 AbstractCegarLoop]: Backedges is MCR [2020-09-17 14:53:57,063 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-17 14:53:57,063 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-17 14:53:57,064 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-17 14:53:57,064 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-17 14:53:57,084 INFO L152 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 57 places, 55 transitions, 120 flow [2020-09-17 14:53:57,087 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 57 places, 55 transitions, 120 flow [2020-09-17 14:53:57,139 INFO L129 PetriNetUnfolder]: 5/53 cut-off events. [2020-09-17 14:53:57,140 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-09-17 14:53:57,148 INFO L80 FinitePrefix]: Finished finitePrefix Result has 60 conditions, 53 events. 5/53 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 79 event pairs, 0 based on Foata normal form. 0/47 useless extension candidates. Maximal degree in co-relation 41. Up to 2 conditions per place. [2020-09-17 14:53:57,151 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 57 places, 55 transitions, 120 flow [2020-09-17 14:53:57,171 INFO L129 PetriNetUnfolder]: 5/53 cut-off events. [2020-09-17 14:53:57,172 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-09-17 14:53:57,173 INFO L80 FinitePrefix]: Finished finitePrefix Result has 60 conditions, 53 events. 5/53 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 79 event pairs, 0 based on Foata normal form. 0/47 useless extension candidates. Maximal degree in co-relation 41. Up to 2 conditions per place. [2020-09-17 14:53:57,175 INFO L158 etLargeBlockEncoding]: Number of co-enabled transitions 924 [2020-09-17 14:53:57,176 INFO L182 etLargeBlockEncoding]: Variable Check. [2020-09-17 14:53:58,291 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 55 [2020-09-17 14:53:58,526 INFO L206 etLargeBlockEncoding]: Checked pairs total: 851 [2020-09-17 14:53:58,526 INFO L214 etLargeBlockEncoding]: Total number of compositions: 42 [2020-09-17 14:53:58,532 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 20 places, 15 transitions, 40 flow [2020-09-17 14:53:58,547 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 44 states. [2020-09-17 14:53:58,550 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states. [2020-09-17 14:53:58,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-09-17 14:53:58,560 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 14:53:58,561 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-09-17 14:53:58,562 INFO L427 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 14:53:58,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 14:53:58,570 INFO L82 PathProgramCache]: Analyzing trace with hash -1798862799, now seen corresponding path program 1 times [2020-09-17 14:53:58,597 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 14:53:58,598 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125182171] [2020-09-17 14:53:58,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 14:53:58,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:53:58,890 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:53:58,891 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125182171] [2020-09-17 14:53:58,892 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-17 14:53:58,892 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-09-17 14:53:58,893 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1393072942] [2020-09-17 14:53:58,895 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 14:53:58,899 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 14:53:58,922 INFO L274 McrAutomatonBuilder]: Finished intersection with 7 states and 6 transitions. [2020-09-17 14:53:58,922 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 14:53:58,925 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-09-17 14:53:58,926 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-17 14:53:58,927 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 14:53:58,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-17 14:53:58,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-17 14:53:58,956 INFO L87 Difference]: Start difference. First operand 44 states. Second operand 4 states. [2020-09-17 14:53:59,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 14:53:59,044 INFO L93 Difference]: Finished difference Result 75 states and 190 transitions. [2020-09-17 14:53:59,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-17 14:53:59,047 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2020-09-17 14:53:59,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 14:53:59,067 INFO L225 Difference]: With dead ends: 75 [2020-09-17 14:53:59,067 INFO L226 Difference]: Without dead ends: 42 [2020-09-17 14:53:59,069 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-09-17 14:53:59,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-09-17 14:53:59,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-09-17 14:53:59,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-09-17 14:53:59,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 98 transitions. [2020-09-17 14:53:59,131 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 98 transitions. Word has length 6 [2020-09-17 14:53:59,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 14:53:59,132 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 98 transitions. [2020-09-17 14:53:59,132 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-17 14:53:59,132 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 98 transitions. [2020-09-17 14:53:59,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-09-17 14:53:59,133 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 14:53:59,133 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 14:53:59,134 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-17 14:53:59,134 INFO L427 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 14:53:59,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 14:53:59,135 INFO L82 PathProgramCache]: Analyzing trace with hash -1777031324, now seen corresponding path program 1 times [2020-09-17 14:53:59,135 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 14:53:59,135 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [382732987] [2020-09-17 14:53:59,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 14:53:59,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:53:59,296 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:53:59,297 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [382732987] [2020-09-17 14:53:59,297 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-17 14:53:59,298 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-17 14:53:59,298 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [825067186] [2020-09-17 14:53:59,298 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 14:53:59,300 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 14:53:59,307 INFO L274 McrAutomatonBuilder]: Finished intersection with 13 states and 16 transitions. [2020-09-17 14:53:59,307 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 14:53:59,353 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-09-17 14:53:59,355 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-17 14:53:59,355 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 14:53:59,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-17 14:53:59,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-09-17 14:53:59,356 INFO L87 Difference]: Start difference. First operand 42 states and 98 transitions. Second operand 5 states. [2020-09-17 14:53:59,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 14:53:59,399 INFO L93 Difference]: Finished difference Result 56 states and 130 transitions. [2020-09-17 14:53:59,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-17 14:53:59,400 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-09-17 14:53:59,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 14:53:59,402 INFO L225 Difference]: With dead ends: 56 [2020-09-17 14:53:59,402 INFO L226 Difference]: Without dead ends: 50 [2020-09-17 14:53:59,403 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2020-09-17 14:53:59,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-09-17 14:53:59,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 42. [2020-09-17 14:53:59,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-09-17 14:53:59,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 100 transitions. [2020-09-17 14:53:59,412 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 100 transitions. Word has length 8 [2020-09-17 14:53:59,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 14:53:59,414 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 100 transitions. [2020-09-17 14:53:59,414 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-17 14:53:59,414 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 100 transitions. [2020-09-17 14:53:59,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-09-17 14:53:59,415 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 14:53:59,416 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 14:53:59,416 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-17 14:53:59,416 INFO L427 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 14:53:59,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 14:53:59,417 INFO L82 PathProgramCache]: Analyzing trace with hash 1669374595, now seen corresponding path program 1 times [2020-09-17 14:53:59,417 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 14:53:59,418 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1702382967] [2020-09-17 14:53:59,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 14:53:59,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:53:59,517 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:53:59,518 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1702382967] [2020-09-17 14:53:59,518 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-17 14:53:59,518 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-17 14:53:59,519 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [273963426] [2020-09-17 14:53:59,519 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 14:53:59,520 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 14:53:59,523 INFO L274 McrAutomatonBuilder]: Finished intersection with 19 states and 26 transitions. [2020-09-17 14:53:59,523 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 14:53:59,532 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:53:59,533 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:53:59,592 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [466#(and (<= ~i~0 16) (<= ~j~0 8))] [2020-09-17 14:53:59,592 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-17 14:53:59,593 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 14:53:59,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-17 14:53:59,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-09-17 14:53:59,593 INFO L87 Difference]: Start difference. First operand 42 states and 100 transitions. Second operand 7 states. [2020-09-17 14:53:59,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 14:53:59,735 INFO L93 Difference]: Finished difference Result 62 states and 148 transitions. [2020-09-17 14:53:59,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-17 14:53:59,736 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 10 [2020-09-17 14:53:59,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 14:53:59,737 INFO L225 Difference]: With dead ends: 62 [2020-09-17 14:53:59,737 INFO L226 Difference]: Without dead ends: 44 [2020-09-17 14:53:59,738 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2020-09-17 14:53:59,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-09-17 14:53:59,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 34. [2020-09-17 14:53:59,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-09-17 14:53:59,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 82 transitions. [2020-09-17 14:53:59,744 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 82 transitions. Word has length 10 [2020-09-17 14:53:59,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 14:53:59,745 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 82 transitions. [2020-09-17 14:53:59,745 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-17 14:53:59,745 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 82 transitions. [2020-09-17 14:53:59,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-17 14:53:59,746 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 14:53:59,746 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 14:53:59,746 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-17 14:53:59,747 INFO L427 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 14:53:59,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 14:53:59,747 INFO L82 PathProgramCache]: Analyzing trace with hash 976950295, now seen corresponding path program 2 times [2020-09-17 14:53:59,747 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 14:53:59,748 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1103073022] [2020-09-17 14:53:59,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 14:53:59,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:53:59,863 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:53:59,864 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1103073022] [2020-09-17 14:53:59,864 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [710904168] [2020-09-17 14:53:59,864 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 14:53:59,943 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 14:53:59,943 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 14:53:59,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core [2020-09-17 14:53:59,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 14:53:59,978 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:53:59,979 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 14:53:59,979 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2020-09-17 14:53:59,980 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1462983240] [2020-09-17 14:53:59,980 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 14:53:59,981 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 14:53:59,984 INFO L274 McrAutomatonBuilder]: Finished intersection with 21 states and 31 transitions. [2020-09-17 14:53:59,984 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 14:53:59,986 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:53:59,987 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:54:00,020 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:54:00,020 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:54:00,041 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:54:00,041 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:54:00,062 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:54:00,063 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:54:00,073 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:54:00,074 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:54:00,082 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:54:00,082 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:54:00,102 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:54:00,102 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:54:00,117 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:54:00,117 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:54:00,131 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [644#(and (<= ~j~0 4) (<= ~i~0 16))] [2020-09-17 14:54:00,132 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-17 14:54:00,132 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 14:54:00,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-17 14:54:00,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-09-17 14:54:00,133 INFO L87 Difference]: Start difference. First operand 34 states and 82 transitions. Second operand 8 states. [2020-09-17 14:54:00,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 14:54:00,307 INFO L93 Difference]: Finished difference Result 56 states and 131 transitions. [2020-09-17 14:54:00,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-17 14:54:00,308 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 11 [2020-09-17 14:54:00,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 14:54:00,309 INFO L225 Difference]: With dead ends: 56 [2020-09-17 14:54:00,309 INFO L226 Difference]: Without dead ends: 50 [2020-09-17 14:54:00,309 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 20 SyntacticMatches, 7 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2020-09-17 14:54:00,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-09-17 14:54:00,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 42. [2020-09-17 14:54:00,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-09-17 14:54:00,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 104 transitions. [2020-09-17 14:54:00,317 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 104 transitions. Word has length 11 [2020-09-17 14:54:00,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 14:54:00,317 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 104 transitions. [2020-09-17 14:54:00,318 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-17 14:54:00,318 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 104 transitions. [2020-09-17 14:54:00,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-17 14:54:00,319 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 14:54:00,319 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 14:54:00,525 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 14:54:00,526 INFO L427 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 14:54:00,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 14:54:00,527 INFO L82 PathProgramCache]: Analyzing trace with hash 993527545, now seen corresponding path program 3 times [2020-09-17 14:54:00,527 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 14:54:00,528 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1587090018] [2020-09-17 14:54:00,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 14:54:00,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:54:00,679 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:54:00,679 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1587090018] [2020-09-17 14:54:00,680 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [787130939] [2020-09-17 14:54:00,680 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 14:54:00,735 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-09-17 14:54:00,736 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 14:54:00,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core [2020-09-17 14:54:00,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 14:54:00,756 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:54:00,756 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 14:54:00,756 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2020-09-17 14:54:00,757 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [253415495] [2020-09-17 14:54:00,757 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 14:54:00,758 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 14:54:00,760 INFO L274 McrAutomatonBuilder]: Finished intersection with 17 states and 21 transitions. [2020-09-17 14:54:00,760 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 14:54:00,762 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:54:00,762 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:54:00,800 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:54:00,800 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:54:00,817 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [832#(and (<= ~j~0 6) (<= ~i~0 16))] [2020-09-17 14:54:00,818 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-17 14:54:00,818 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 14:54:00,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-17 14:54:00,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-09-17 14:54:00,819 INFO L87 Difference]: Start difference. First operand 42 states and 104 transitions. Second operand 8 states. [2020-09-17 14:54:01,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 14:54:01,033 INFO L93 Difference]: Finished difference Result 66 states and 159 transitions. [2020-09-17 14:54:01,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-17 14:54:01,034 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 11 [2020-09-17 14:54:01,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 14:54:01,035 INFO L225 Difference]: With dead ends: 66 [2020-09-17 14:54:01,035 INFO L226 Difference]: Without dead ends: 54 [2020-09-17 14:54:01,035 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=90, Invalid=182, Unknown=0, NotChecked=0, Total=272 [2020-09-17 14:54:01,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-09-17 14:54:01,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 38. [2020-09-17 14:54:01,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-09-17 14:54:01,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 91 transitions. [2020-09-17 14:54:01,042 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 91 transitions. Word has length 11 [2020-09-17 14:54:01,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 14:54:01,042 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 91 transitions. [2020-09-17 14:54:01,042 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-17 14:54:01,042 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 91 transitions. [2020-09-17 14:54:01,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-17 14:54:01,043 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 14:54:01,043 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 14:54:01,256 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 14:54:01,257 INFO L427 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 14:54:01,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 14:54:01,257 INFO L82 PathProgramCache]: Analyzing trace with hash -2048766974, now seen corresponding path program 4 times [2020-09-17 14:54:01,258 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 14:54:01,258 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1120858066] [2020-09-17 14:54:01,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 14:54:01,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:54:01,347 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:54:01,348 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1120858066] [2020-09-17 14:54:01,348 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2099761620] [2020-09-17 14:54:01,348 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 14:54:01,409 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 14:54:01,409 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 14:54:01,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-17 14:54:01,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 14:54:01,435 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:54:01,436 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 14:54:01,436 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2020-09-17 14:54:01,436 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1850017305] [2020-09-17 14:54:01,437 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 14:54:01,438 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 14:54:01,441 INFO L274 McrAutomatonBuilder]: Finished intersection with 21 states and 28 transitions. [2020-09-17 14:54:01,441 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 14:54:01,446 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:54:01,446 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:54:01,496 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:54:01,496 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:54:01,515 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [1034#(and (<= ~i~0 16) (<= ~j~0 8))] [2020-09-17 14:54:01,515 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-17 14:54:01,515 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 14:54:01,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-17 14:54:01,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-09-17 14:54:01,516 INFO L87 Difference]: Start difference. First operand 38 states and 91 transitions. Second operand 9 states. [2020-09-17 14:54:01,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 14:54:01,697 INFO L93 Difference]: Finished difference Result 64 states and 149 transitions. [2020-09-17 14:54:01,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-17 14:54:01,698 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 12 [2020-09-17 14:54:01,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 14:54:01,699 INFO L225 Difference]: With dead ends: 64 [2020-09-17 14:54:01,699 INFO L226 Difference]: Without dead ends: 58 [2020-09-17 14:54:01,699 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2020-09-17 14:54:01,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-09-17 14:54:01,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 45. [2020-09-17 14:54:01,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-09-17 14:54:01,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 112 transitions. [2020-09-17 14:54:01,710 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 112 transitions. Word has length 12 [2020-09-17 14:54:01,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 14:54:01,711 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 112 transitions. [2020-09-17 14:54:01,711 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-17 14:54:01,711 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 112 transitions. [2020-09-17 14:54:01,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-17 14:54:01,712 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 14:54:01,712 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 14:54:01,916 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 14:54:01,917 INFO L427 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 14:54:01,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 14:54:01,918 INFO L82 PathProgramCache]: Analyzing trace with hash -2032189724, now seen corresponding path program 5 times [2020-09-17 14:54:01,919 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 14:54:01,919 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1385659822] [2020-09-17 14:54:01,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 14:54:01,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:54:02,050 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:54:02,051 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1385659822] [2020-09-17 14:54:02,051 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [275247747] [2020-09-17 14:54:02,051 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 14:54:02,118 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 14:54:02,119 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 14:54:02,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-17 14:54:02,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 14:54:02,141 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:54:02,141 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 14:54:02,141 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2020-09-17 14:54:02,142 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [573217112] [2020-09-17 14:54:02,142 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 14:54:02,144 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 14:54:02,147 INFO L274 McrAutomatonBuilder]: Finished intersection with 20 states and 26 transitions. [2020-09-17 14:54:02,147 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 14:54:02,149 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:54:02,150 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:54:02,197 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:54:02,197 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:54:02,219 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [1244#(and (<= ~j~0 10) (<= ~i~0 16))] [2020-09-17 14:54:02,220 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-17 14:54:02,220 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 14:54:02,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-17 14:54:02,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-09-17 14:54:02,221 INFO L87 Difference]: Start difference. First operand 45 states and 112 transitions. Second operand 9 states. [2020-09-17 14:54:02,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 14:54:02,469 INFO L93 Difference]: Finished difference Result 63 states and 155 transitions. [2020-09-17 14:54:02,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-17 14:54:02,470 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 12 [2020-09-17 14:54:02,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 14:54:02,471 INFO L225 Difference]: With dead ends: 63 [2020-09-17 14:54:02,471 INFO L226 Difference]: Without dead ends: 51 [2020-09-17 14:54:02,472 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=100, Invalid=206, Unknown=0, NotChecked=0, Total=306 [2020-09-17 14:54:02,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-09-17 14:54:02,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 38. [2020-09-17 14:54:02,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-09-17 14:54:02,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 92 transitions. [2020-09-17 14:54:02,483 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 92 transitions. Word has length 12 [2020-09-17 14:54:02,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 14:54:02,484 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 92 transitions. [2020-09-17 14:54:02,484 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-17 14:54:02,484 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 92 transitions. [2020-09-17 14:54:02,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-17 14:54:02,485 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 14:54:02,485 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 14:54:02,697 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 14:54:02,698 INFO L427 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 14:54:02,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 14:54:02,699 INFO L82 PathProgramCache]: Analyzing trace with hash -1748588394, now seen corresponding path program 6 times [2020-09-17 14:54:02,699 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 14:54:02,700 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1275242863] [2020-09-17 14:54:02,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 14:54:02,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:54:02,855 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:54:02,855 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1275242863] [2020-09-17 14:54:02,856 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2041104044] [2020-09-17 14:54:02,856 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 14:54:02,908 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-09-17 14:54:02,908 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 14:54:02,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-17 14:54:02,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 14:54:02,935 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:54:02,936 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 14:54:02,936 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2020-09-17 14:54:02,936 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1055953902] [2020-09-17 14:54:02,936 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 14:54:02,938 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 14:54:02,942 INFO L274 McrAutomatonBuilder]: Finished intersection with 23 states and 33 transitions. [2020-09-17 14:54:02,942 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 14:54:02,944 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:54:02,944 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:54:02,982 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:54:02,982 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:54:03,007 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:54:03,007 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:54:03,020 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:54:03,020 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:54:03,034 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:54:03,034 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:54:03,050 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:54:03,050 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:54:03,088 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:54:03,089 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:54:03,095 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:54:03,096 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:54:03,107 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [1447#(and (<= ~j~0 4) (<= ~i~0 16))] [2020-09-17 14:54:03,107 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-17 14:54:03,107 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 14:54:03,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-17 14:54:03,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-09-17 14:54:03,108 INFO L87 Difference]: Start difference. First operand 38 states and 92 transitions. Second operand 10 states. [2020-09-17 14:54:03,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 14:54:03,322 INFO L93 Difference]: Finished difference Result 60 states and 140 transitions. [2020-09-17 14:54:03,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-17 14:54:03,323 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2020-09-17 14:54:03,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 14:54:03,324 INFO L225 Difference]: With dead ends: 60 [2020-09-17 14:54:03,324 INFO L226 Difference]: Without dead ends: 54 [2020-09-17 14:54:03,325 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 22 SyntacticMatches, 7 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2020-09-17 14:54:03,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-09-17 14:54:03,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 46. [2020-09-17 14:54:03,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-09-17 14:54:03,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 112 transitions. [2020-09-17 14:54:03,337 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 112 transitions. Word has length 13 [2020-09-17 14:54:03,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 14:54:03,338 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 112 transitions. [2020-09-17 14:54:03,339 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-17 14:54:03,339 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 112 transitions. [2020-09-17 14:54:03,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-17 14:54:03,340 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 14:54:03,340 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 14:54:03,558 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 14:54:03,559 INFO L427 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 14:54:03,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 14:54:03,560 INFO L82 PathProgramCache]: Analyzing trace with hash 1297246968, now seen corresponding path program 7 times [2020-09-17 14:54:03,560 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 14:54:03,561 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719391171] [2020-09-17 14:54:03,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 14:54:03,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:54:03,674 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:54:03,674 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [719391171] [2020-09-17 14:54:03,675 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1560276667] [2020-09-17 14:54:03,675 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 14:54:03,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:54:03,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-17 14:54:03,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 14:54:03,793 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:54:03,795 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 14:54:03,795 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2020-09-17 14:54:03,796 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [26479622] [2020-09-17 14:54:03,796 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 14:54:03,800 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 14:54:03,807 INFO L274 McrAutomatonBuilder]: Finished intersection with 19 states and 23 transitions. [2020-09-17 14:54:03,808 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 14:54:03,816 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:54:03,818 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:54:03,862 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:54:03,863 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:54:03,881 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [1659#(and (<= ~j~0 6) (<= ~i~0 16))] [2020-09-17 14:54:03,882 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-17 14:54:03,882 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 14:54:03,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-17 14:54:03,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2020-09-17 14:54:03,884 INFO L87 Difference]: Start difference. First operand 46 states and 112 transitions. Second operand 10 states. [2020-09-17 14:54:04,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 14:54:04,165 INFO L93 Difference]: Finished difference Result 74 states and 171 transitions. [2020-09-17 14:54:04,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-17 14:54:04,165 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2020-09-17 14:54:04,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 14:54:04,166 INFO L225 Difference]: With dead ends: 74 [2020-09-17 14:54:04,166 INFO L226 Difference]: Without dead ends: 68 [2020-09-17 14:54:04,167 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=125, Invalid=295, Unknown=0, NotChecked=0, Total=420 [2020-09-17 14:54:04,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-09-17 14:54:04,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 48. [2020-09-17 14:54:04,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-09-17 14:54:04,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 120 transitions. [2020-09-17 14:54:04,172 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 120 transitions. Word has length 13 [2020-09-17 14:54:04,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 14:54:04,173 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 120 transitions. [2020-09-17 14:54:04,173 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-17 14:54:04,173 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 120 transitions. [2020-09-17 14:54:04,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-17 14:54:04,174 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 14:54:04,174 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 14:54:04,386 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 14:54:04,387 INFO L427 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 14:54:04,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 14:54:04,388 INFO L82 PathProgramCache]: Analyzing trace with hash 1313824218, now seen corresponding path program 8 times [2020-09-17 14:54:04,388 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 14:54:04,390 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [448106046] [2020-09-17 14:54:04,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 14:54:04,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:54:04,524 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:54:04,524 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [448106046] [2020-09-17 14:54:04,525 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1372769936] [2020-09-17 14:54:04,525 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 14:54:04,579 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 14:54:04,580 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 14:54:04,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-17 14:54:04,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 14:54:04,601 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:54:04,601 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 14:54:04,602 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2020-09-17 14:54:04,602 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [783815800] [2020-09-17 14:54:04,602 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 14:54:04,603 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 14:54:04,606 INFO L274 McrAutomatonBuilder]: Finished intersection with 19 states and 23 transitions. [2020-09-17 14:54:04,606 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 14:54:04,613 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:54:04,613 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:54:04,642 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:54:04,642 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:54:04,652 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [1897#(and (<= ~i~0 16) (<= ~j~0 8))] [2020-09-17 14:54:04,652 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-17 14:54:04,653 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 14:54:04,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-17 14:54:04,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-09-17 14:54:04,653 INFO L87 Difference]: Start difference. First operand 48 states and 120 transitions. Second operand 10 states. [2020-09-17 14:54:04,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 14:54:04,981 INFO L93 Difference]: Finished difference Result 74 states and 179 transitions. [2020-09-17 14:54:04,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-17 14:54:04,982 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2020-09-17 14:54:04,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 14:54:04,983 INFO L225 Difference]: With dead ends: 74 [2020-09-17 14:54:04,983 INFO L226 Difference]: Without dead ends: 62 [2020-09-17 14:54:04,984 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=166, Invalid=340, Unknown=0, NotChecked=0, Total=506 [2020-09-17 14:54:04,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-09-17 14:54:04,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 42. [2020-09-17 14:54:04,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-09-17 14:54:04,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 101 transitions. [2020-09-17 14:54:04,997 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 101 transitions. Word has length 13 [2020-09-17 14:54:04,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 14:54:04,997 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 101 transitions. [2020-09-17 14:54:04,997 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-17 14:54:04,999 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 101 transitions. [2020-09-17 14:54:04,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-17 14:54:04,999 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 14:54:04,999 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 14:54:05,200 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-09-17 14:54:05,201 INFO L427 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 14:54:05,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 14:54:05,201 INFO L82 PathProgramCache]: Analyzing trace with hash -1770024511, now seen corresponding path program 9 times [2020-09-17 14:54:05,202 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 14:54:05,202 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [217264227] [2020-09-17 14:54:05,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 14:54:05,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:54:05,322 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:54:05,323 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [217264227] [2020-09-17 14:54:05,323 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [507447161] [2020-09-17 14:54:05,323 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 14:54:05,391 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-17 14:54:05,391 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 14:54:05,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-17 14:54:05,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 14:54:05,414 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:54:05,415 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 14:54:05,415 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2020-09-17 14:54:05,415 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [806257657] [2020-09-17 14:54:05,416 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 14:54:05,420 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 14:54:05,425 INFO L274 McrAutomatonBuilder]: Finished intersection with 23 states and 30 transitions. [2020-09-17 14:54:05,426 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 14:54:05,432 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:54:05,432 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:54:05,479 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:54:05,479 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:54:05,496 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [2131#(and (<= ~i~0 16) (<= ~j~0 8))] [2020-09-17 14:54:05,496 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-17 14:54:05,496 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 14:54:05,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-17 14:54:05,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-09-17 14:54:05,497 INFO L87 Difference]: Start difference. First operand 42 states and 101 transitions. Second operand 11 states. [2020-09-17 14:54:05,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 14:54:05,743 INFO L93 Difference]: Finished difference Result 70 states and 162 transitions. [2020-09-17 14:54:05,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-17 14:54:05,744 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2020-09-17 14:54:05,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 14:54:05,745 INFO L225 Difference]: With dead ends: 70 [2020-09-17 14:54:05,745 INFO L226 Difference]: Without dead ends: 64 [2020-09-17 14:54:05,745 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=107, Invalid=273, Unknown=0, NotChecked=0, Total=380 [2020-09-17 14:54:05,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-09-17 14:54:05,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 49. [2020-09-17 14:54:05,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-09-17 14:54:05,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 120 transitions. [2020-09-17 14:54:05,752 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 120 transitions. Word has length 14 [2020-09-17 14:54:05,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 14:54:05,759 INFO L479 AbstractCegarLoop]: Abstraction has 49 states and 120 transitions. [2020-09-17 14:54:05,759 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-17 14:54:05,759 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 120 transitions. [2020-09-17 14:54:05,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-17 14:54:05,760 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 14:54:05,760 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 14:54:05,964 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2020-09-17 14:54:05,965 INFO L427 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 14:54:05,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 14:54:05,965 INFO L82 PathProgramCache]: Analyzing trace with hash 1275810851, now seen corresponding path program 10 times [2020-09-17 14:54:05,966 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 14:54:05,966 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1192570244] [2020-09-17 14:54:05,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 14:54:05,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:54:06,079 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:54:06,080 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1192570244] [2020-09-17 14:54:06,080 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [301663455] [2020-09-17 14:54:06,081 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 14:54:06,142 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 14:54:06,143 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 14:54:06,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-17 14:54:06,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 14:54:06,163 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:54:06,164 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 14:54:06,164 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2020-09-17 14:54:06,164 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1168325687] [2020-09-17 14:54:06,165 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 14:54:06,166 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 14:54:06,169 INFO L274 McrAutomatonBuilder]: Finished intersection with 22 states and 28 transitions. [2020-09-17 14:54:06,170 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 14:54:06,177 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:54:06,178 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:54:06,208 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:54:06,209 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:54:06,221 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [2367#(and (<= ~j~0 10) (<= ~i~0 16))] [2020-09-17 14:54:06,221 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-17 14:54:06,221 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 14:54:06,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-17 14:54:06,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2020-09-17 14:54:06,222 INFO L87 Difference]: Start difference. First operand 49 states and 120 transitions. Second operand 11 states. [2020-09-17 14:54:06,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 14:54:06,533 INFO L93 Difference]: Finished difference Result 69 states and 163 transitions. [2020-09-17 14:54:06,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-17 14:54:06,534 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2020-09-17 14:54:06,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 14:54:06,534 INFO L225 Difference]: With dead ends: 69 [2020-09-17 14:54:06,535 INFO L226 Difference]: Without dead ends: 63 [2020-09-17 14:54:06,535 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=135, Invalid=327, Unknown=0, NotChecked=0, Total=462 [2020-09-17 14:54:06,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-09-17 14:54:06,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 51. [2020-09-17 14:54:06,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-09-17 14:54:06,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 128 transitions. [2020-09-17 14:54:06,540 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 128 transitions. Word has length 14 [2020-09-17 14:54:06,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 14:54:06,540 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 128 transitions. [2020-09-17 14:54:06,540 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-17 14:54:06,541 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 128 transitions. [2020-09-17 14:54:06,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-17 14:54:06,541 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 14:54:06,541 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 14:54:06,752 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 14:54:06,752 INFO L427 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 14:54:06,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 14:54:06,753 INFO L82 PathProgramCache]: Analyzing trace with hash 1292388101, now seen corresponding path program 11 times [2020-09-17 14:54:06,754 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 14:54:06,754 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [553022340] [2020-09-17 14:54:06,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 14:54:06,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:54:06,847 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:54:06,848 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [553022340] [2020-09-17 14:54:06,848 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2127889073] [2020-09-17 14:54:06,848 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 14:54:06,898 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-09-17 14:54:06,898 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 14:54:06,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-17 14:54:06,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 14:54:06,915 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:54:06,916 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 14:54:06,916 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2020-09-17 14:54:06,916 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [378194779] [2020-09-17 14:54:06,917 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 14:54:06,918 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 14:54:06,921 INFO L274 McrAutomatonBuilder]: Finished intersection with 22 states and 28 transitions. [2020-09-17 14:54:06,921 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 14:54:06,934 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:54:06,934 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:54:06,977 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:54:06,977 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:54:06,993 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [2610#(and (<= ~j~0 12) (<= ~i~0 16))] [2020-09-17 14:54:06,994 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-17 14:54:06,994 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 14:54:06,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-17 14:54:06,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-09-17 14:54:06,995 INFO L87 Difference]: Start difference. First operand 51 states and 128 transitions. Second operand 11 states. [2020-09-17 14:54:07,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 14:54:07,392 INFO L93 Difference]: Finished difference Result 69 states and 171 transitions. [2020-09-17 14:54:07,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-17 14:54:07,393 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2020-09-17 14:54:07,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 14:54:07,394 INFO L225 Difference]: With dead ends: 69 [2020-09-17 14:54:07,394 INFO L226 Difference]: Without dead ends: 57 [2020-09-17 14:54:07,395 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=177, Invalid=375, Unknown=0, NotChecked=0, Total=552 [2020-09-17 14:54:07,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-09-17 14:54:07,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 42. [2020-09-17 14:54:07,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-09-17 14:54:07,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 102 transitions. [2020-09-17 14:54:07,401 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 102 transitions. Word has length 14 [2020-09-17 14:54:07,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 14:54:07,401 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 102 transitions. [2020-09-17 14:54:07,401 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-17 14:54:07,401 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 102 transitions. [2020-09-17 14:54:07,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-17 14:54:07,402 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 14:54:07,402 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 14:54:07,614 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 14:54:07,615 INFO L427 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 14:54:07,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 14:54:07,616 INFO L82 PathProgramCache]: Analyzing trace with hash -1061217963, now seen corresponding path program 12 times [2020-09-17 14:54:07,616 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 14:54:07,617 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [44762146] [2020-09-17 14:54:07,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 14:54:07,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:54:07,768 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:54:07,769 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [44762146] [2020-09-17 14:54:07,769 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1134918065] [2020-09-17 14:54:07,769 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 14:54:07,842 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-09-17 14:54:07,842 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 14:54:07,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-17 14:54:07,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 14:54:07,856 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:54:07,856 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 14:54:07,857 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2020-09-17 14:54:07,857 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1520239606] [2020-09-17 14:54:07,857 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 14:54:07,859 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 14:54:07,863 INFO L274 McrAutomatonBuilder]: Finished intersection with 25 states and 35 transitions. [2020-09-17 14:54:07,863 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 14:54:07,864 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:54:07,865 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:54:07,891 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:54:07,891 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:54:07,907 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:54:07,908 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:54:07,914 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:54:07,914 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:54:07,925 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:54:07,925 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:54:07,946 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:54:07,947 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:54:07,961 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:54:07,961 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:54:07,969 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:54:07,969 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:54:07,979 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [2843#(and (<= ~j~0 4) (<= ~i~0 16))] [2020-09-17 14:54:07,980 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-17 14:54:07,980 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 14:54:07,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-17 14:54:07,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2020-09-17 14:54:07,981 INFO L87 Difference]: Start difference. First operand 42 states and 102 transitions. Second operand 12 states. [2020-09-17 14:54:08,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 14:54:08,208 INFO L93 Difference]: Finished difference Result 66 states and 154 transitions. [2020-09-17 14:54:08,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-17 14:54:08,209 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-09-17 14:54:08,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 14:54:08,209 INFO L225 Difference]: With dead ends: 66 [2020-09-17 14:54:08,209 INFO L226 Difference]: Without dead ends: 60 [2020-09-17 14:54:08,210 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 24 SyntacticMatches, 7 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=121, Invalid=299, Unknown=0, NotChecked=0, Total=420 [2020-09-17 14:54:08,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-09-17 14:54:08,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 50. [2020-09-17 14:54:08,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-09-17 14:54:08,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 122 transitions. [2020-09-17 14:54:08,213 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 122 transitions. Word has length 15 [2020-09-17 14:54:08,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 14:54:08,214 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 122 transitions. [2020-09-17 14:54:08,214 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-17 14:54:08,214 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 122 transitions. [2020-09-17 14:54:08,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-17 14:54:08,215 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 14:54:08,215 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 14:54:08,424 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-09-17 14:54:08,424 INFO L427 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 14:54:08,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 14:54:08,425 INFO L82 PathProgramCache]: Analyzing trace with hash 1113836343, now seen corresponding path program 13 times [2020-09-17 14:54:08,426 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 14:54:08,426 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1239361394] [2020-09-17 14:54:08,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 14:54:08,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:54:08,551 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:54:08,552 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1239361394] [2020-09-17 14:54:08,552 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [740212204] [2020-09-17 14:54:08,552 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 14:54:08,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:54:08,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-17 14:54:08,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 14:54:08,632 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:54:08,633 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 14:54:08,633 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2020-09-17 14:54:08,633 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1867506951] [2020-09-17 14:54:08,633 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 14:54:08,634 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 14:54:08,637 INFO L274 McrAutomatonBuilder]: Finished intersection with 21 states and 25 transitions. [2020-09-17 14:54:08,638 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 14:54:08,640 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:54:08,641 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:54:08,670 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:54:08,671 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:54:08,680 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [3081#(and (<= ~j~0 6) (<= ~i~0 16))] [2020-09-17 14:54:08,681 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-17 14:54:08,681 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 14:54:08,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-17 14:54:08,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2020-09-17 14:54:08,682 INFO L87 Difference]: Start difference. First operand 50 states and 122 transitions. Second operand 12 states. [2020-09-17 14:54:09,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 14:54:09,041 INFO L93 Difference]: Finished difference Result 82 states and 188 transitions. [2020-09-17 14:54:09,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-17 14:54:09,042 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-09-17 14:54:09,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 14:54:09,044 INFO L225 Difference]: With dead ends: 82 [2020-09-17 14:54:09,044 INFO L226 Difference]: Without dead ends: 76 [2020-09-17 14:54:09,044 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=168, Invalid=432, Unknown=0, NotChecked=0, Total=600 [2020-09-17 14:54:09,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-09-17 14:54:09,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 52. [2020-09-17 14:54:09,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-09-17 14:54:09,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 128 transitions. [2020-09-17 14:54:09,048 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 128 transitions. Word has length 15 [2020-09-17 14:54:09,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 14:54:09,049 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 128 transitions. [2020-09-17 14:54:09,049 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-17 14:54:09,049 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 128 transitions. [2020-09-17 14:54:09,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-17 14:54:09,049 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 14:54:09,050 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 14:54:09,250 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-09-17 14:54:09,250 INFO L427 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 14:54:09,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 14:54:09,251 INFO L82 PathProgramCache]: Analyzing trace with hash -135295591, now seen corresponding path program 14 times [2020-09-17 14:54:09,251 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 14:54:09,252 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407771302] [2020-09-17 14:54:09,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 14:54:09,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:54:09,362 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:54:09,363 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [407771302] [2020-09-17 14:54:09,363 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2075798271] [2020-09-17 14:54:09,364 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 14:54:09,420 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 14:54:09,420 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 14:54:09,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-17 14:54:09,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 14:54:09,441 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:54:09,441 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 14:54:09,441 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2020-09-17 14:54:09,442 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1896129749] [2020-09-17 14:54:09,442 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 14:54:09,443 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 14:54:09,446 INFO L274 McrAutomatonBuilder]: Finished intersection with 21 states and 25 transitions. [2020-09-17 14:54:09,446 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 14:54:09,447 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:54:09,448 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:54:09,488 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:54:09,488 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:54:09,499 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [3347#(and (<= ~i~0 16) (<= ~j~0 8))] [2020-09-17 14:54:09,500 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-17 14:54:09,500 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 14:54:09,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-17 14:54:09,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2020-09-17 14:54:09,501 INFO L87 Difference]: Start difference. First operand 52 states and 128 transitions. Second operand 12 states. [2020-09-17 14:54:09,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 14:54:09,934 INFO L93 Difference]: Finished difference Result 81 states and 189 transitions. [2020-09-17 14:54:09,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-17 14:54:09,935 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-09-17 14:54:09,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 14:54:09,936 INFO L225 Difference]: With dead ends: 81 [2020-09-17 14:54:09,936 INFO L226 Difference]: Without dead ends: 75 [2020-09-17 14:54:09,937 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=209, Invalid=493, Unknown=0, NotChecked=0, Total=702 [2020-09-17 14:54:09,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-09-17 14:54:09,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 54. [2020-09-17 14:54:09,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-09-17 14:54:09,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 136 transitions. [2020-09-17 14:54:09,942 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 136 transitions. Word has length 15 [2020-09-17 14:54:09,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 14:54:09,943 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 136 transitions. [2020-09-17 14:54:09,943 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-17 14:54:09,943 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 136 transitions. [2020-09-17 14:54:09,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-17 14:54:09,943 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 14:54:09,944 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 14:54:10,155 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-09-17 14:54:10,155 INFO L427 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 14:54:10,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 14:54:10,156 INFO L82 PathProgramCache]: Analyzing trace with hash -118718341, now seen corresponding path program 15 times [2020-09-17 14:54:10,157 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 14:54:10,157 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1641882501] [2020-09-17 14:54:10,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 14:54:10,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:54:10,255 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:54:10,255 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1641882501] [2020-09-17 14:54:10,255 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [583488915] [2020-09-17 14:54:10,256 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 14:54:10,319 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-09-17 14:54:10,319 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 14:54:10,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-17 14:54:10,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 14:54:10,338 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:54:10,339 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 14:54:10,339 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2020-09-17 14:54:10,339 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1032617196] [2020-09-17 14:54:10,339 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 14:54:10,341 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 14:54:10,343 INFO L274 McrAutomatonBuilder]: Finished intersection with 21 states and 25 transitions. [2020-09-17 14:54:10,343 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 14:54:10,349 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:54:10,349 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:54:10,391 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:54:10,391 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:54:10,403 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [3620#(and (<= ~j~0 10) (<= ~i~0 16))] [2020-09-17 14:54:10,404 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-17 14:54:10,404 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 14:54:10,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-17 14:54:10,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2020-09-17 14:54:10,406 INFO L87 Difference]: Start difference. First operand 54 states and 136 transitions. Second operand 12 states. [2020-09-17 14:54:10,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 14:54:10,814 INFO L93 Difference]: Finished difference Result 82 states and 199 transitions. [2020-09-17 14:54:10,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-17 14:54:10,814 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-09-17 14:54:10,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 14:54:10,815 INFO L225 Difference]: With dead ends: 82 [2020-09-17 14:54:10,815 INFO L226 Difference]: Without dead ends: 70 [2020-09-17 14:54:10,816 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=264, Invalid=548, Unknown=0, NotChecked=0, Total=812 [2020-09-17 14:54:10,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-09-17 14:54:10,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 46. [2020-09-17 14:54:10,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-09-17 14:54:10,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 111 transitions. [2020-09-17 14:54:10,819 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 111 transitions. Word has length 15 [2020-09-17 14:54:10,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 14:54:10,820 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 111 transitions. [2020-09-17 14:54:10,820 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-17 14:54:10,820 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 111 transitions. [2020-09-17 14:54:10,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-09-17 14:54:10,821 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 14:54:10,821 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 14:54:11,031 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 14:54:11,031 INFO L427 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 14:54:11,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 14:54:11,032 INFO L82 PathProgramCache]: Analyzing trace with hash -186489920, now seen corresponding path program 16 times [2020-09-17 14:54:11,032 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 14:54:11,032 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [776328026] [2020-09-17 14:54:11,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 14:54:11,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:54:11,172 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:54:11,172 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [776328026] [2020-09-17 14:54:11,173 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [865967116] [2020-09-17 14:54:11,173 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 14:54:11,240 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 14:54:11,240 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 14:54:11,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-17 14:54:11,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 14:54:11,265 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:54:11,266 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 14:54:11,266 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-09-17 14:54:11,266 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [507267237] [2020-09-17 14:54:11,266 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 14:54:11,268 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 14:54:11,272 INFO L274 McrAutomatonBuilder]: Finished intersection with 25 states and 32 transitions. [2020-09-17 14:54:11,272 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 14:54:11,273 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:54:11,274 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:54:11,309 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:54:11,309 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:54:11,323 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [3886#(and (<= ~i~0 16) (<= ~j~0 8))] [2020-09-17 14:54:11,323 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-17 14:54:11,323 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 14:54:11,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-17 14:54:11,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2020-09-17 14:54:11,324 INFO L87 Difference]: Start difference. First operand 46 states and 111 transitions. Second operand 13 states. [2020-09-17 14:54:11,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 14:54:11,630 INFO L93 Difference]: Finished difference Result 78 states and 180 transitions. [2020-09-17 14:54:11,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-17 14:54:11,631 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-09-17 14:54:11,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 14:54:11,632 INFO L225 Difference]: With dead ends: 78 [2020-09-17 14:54:11,632 INFO L226 Difference]: Without dead ends: 72 [2020-09-17 14:54:11,633 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=152, Invalid=400, Unknown=0, NotChecked=0, Total=552 [2020-09-17 14:54:11,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-09-17 14:54:11,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 53. [2020-09-17 14:54:11,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-09-17 14:54:11,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 130 transitions. [2020-09-17 14:54:11,636 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 130 transitions. Word has length 16 [2020-09-17 14:54:11,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 14:54:11,637 INFO L479 AbstractCegarLoop]: Abstraction has 53 states and 130 transitions. [2020-09-17 14:54:11,637 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-17 14:54:11,637 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 130 transitions. [2020-09-17 14:54:11,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-09-17 14:54:11,637 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 14:54:11,637 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 14:54:11,849 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-09-17 14:54:11,849 INFO L427 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 14:54:11,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 14:54:11,850 INFO L82 PathProgramCache]: Analyzing trace with hash 1988564386, now seen corresponding path program 17 times [2020-09-17 14:54:11,851 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 14:54:11,851 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [193318930] [2020-09-17 14:54:11,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 14:54:11,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:54:11,990 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:54:11,990 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [193318930] [2020-09-17 14:54:11,990 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [526868489] [2020-09-17 14:54:11,991 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 14:54:12,061 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-09-17 14:54:12,062 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 14:54:12,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-17 14:54:12,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 14:54:12,086 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:54:12,087 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 14:54:12,087 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-09-17 14:54:12,087 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [18606833] [2020-09-17 14:54:12,088 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 14:54:12,089 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 14:54:12,092 INFO L274 McrAutomatonBuilder]: Finished intersection with 24 states and 30 transitions. [2020-09-17 14:54:12,093 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 14:54:12,098 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:54:12,098 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:54:12,137 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:54:12,137 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:54:12,153 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [4150#(and (<= ~j~0 10) (<= ~i~0 16))] [2020-09-17 14:54:12,154 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-17 14:54:12,154 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 14:54:12,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-17 14:54:12,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2020-09-17 14:54:12,155 INFO L87 Difference]: Start difference. First operand 53 states and 130 transitions. Second operand 13 states. [2020-09-17 14:54:12,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 14:54:12,496 INFO L93 Difference]: Finished difference Result 75 states and 176 transitions. [2020-09-17 14:54:12,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-17 14:54:12,497 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-09-17 14:54:12,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 14:54:12,498 INFO L225 Difference]: With dead ends: 75 [2020-09-17 14:54:12,498 INFO L226 Difference]: Without dead ends: 69 [2020-09-17 14:54:12,499 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=178, Invalid=472, Unknown=0, NotChecked=0, Total=650 [2020-09-17 14:54:12,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-09-17 14:54:12,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 55. [2020-09-17 14:54:12,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-09-17 14:54:12,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 136 transitions. [2020-09-17 14:54:12,502 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 136 transitions. Word has length 16 [2020-09-17 14:54:12,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 14:54:12,503 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 136 transitions. [2020-09-17 14:54:12,503 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-17 14:54:12,503 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 136 transitions. [2020-09-17 14:54:12,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-09-17 14:54:12,504 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 14:54:12,504 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 14:54:12,714 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 14:54:12,714 INFO L427 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 14:54:12,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 14:54:12,715 INFO L82 PathProgramCache]: Analyzing trace with hash 739432452, now seen corresponding path program 18 times [2020-09-17 14:54:12,716 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 14:54:12,716 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [619950246] [2020-09-17 14:54:12,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 14:54:12,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:54:12,826 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:54:12,827 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [619950246] [2020-09-17 14:54:12,827 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [496561667] [2020-09-17 14:54:12,827 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 14:54:12,889 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-09-17 14:54:12,889 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 14:54:12,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-17 14:54:12,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 14:54:12,911 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:54:12,911 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 14:54:12,911 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-09-17 14:54:12,912 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [313158429] [2020-09-17 14:54:12,912 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 14:54:12,913 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 14:54:12,916 INFO L274 McrAutomatonBuilder]: Finished intersection with 24 states and 30 transitions. [2020-09-17 14:54:12,916 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 14:54:12,920 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:54:12,921 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:54:12,954 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:54:12,955 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:54:12,973 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [4419#(and (<= ~j~0 12) (<= ~i~0 16))] [2020-09-17 14:54:12,973 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-17 14:54:12,974 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 14:54:12,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-17 14:54:12,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2020-09-17 14:54:12,974 INFO L87 Difference]: Start difference. First operand 55 states and 136 transitions. Second operand 13 states. [2020-09-17 14:54:13,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 14:54:13,436 INFO L93 Difference]: Finished difference Result 75 states and 179 transitions. [2020-09-17 14:54:13,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-17 14:54:13,437 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-09-17 14:54:13,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 14:54:13,438 INFO L225 Difference]: With dead ends: 75 [2020-09-17 14:54:13,438 INFO L226 Difference]: Without dead ends: 69 [2020-09-17 14:54:13,439 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=220, Invalid=536, Unknown=0, NotChecked=0, Total=756 [2020-09-17 14:54:13,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-09-17 14:54:13,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 57. [2020-09-17 14:54:13,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-09-17 14:54:13,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 144 transitions. [2020-09-17 14:54:13,442 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 144 transitions. Word has length 16 [2020-09-17 14:54:13,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 14:54:13,442 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 144 transitions. [2020-09-17 14:54:13,443 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-17 14:54:13,443 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 144 transitions. [2020-09-17 14:54:13,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-09-17 14:54:13,443 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 14:54:13,443 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 14:54:13,655 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 14:54:13,655 INFO L427 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 14:54:13,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 14:54:13,656 INFO L82 PathProgramCache]: Analyzing trace with hash 756009702, now seen corresponding path program 19 times [2020-09-17 14:54:13,657 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 14:54:13,657 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050615861] [2020-09-17 14:54:13,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 14:54:13,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:54:13,770 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:54:13,771 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1050615861] [2020-09-17 14:54:13,771 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1074325583] [2020-09-17 14:54:13,771 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 14:54:13,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:54:13,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-17 14:54:13,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 14:54:13,867 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:54:13,867 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 14:54:13,867 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-09-17 14:54:13,868 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [714462444] [2020-09-17 14:54:13,868 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 14:54:13,869 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 14:54:13,872 INFO L274 McrAutomatonBuilder]: Finished intersection with 24 states and 30 transitions. [2020-09-17 14:54:13,872 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 14:54:13,873 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:54:13,874 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:54:13,921 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:54:13,921 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:54:13,937 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [4696#(and (<= ~j~0 14) (<= ~i~0 16))] [2020-09-17 14:54:13,937 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-17 14:54:13,938 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 14:54:13,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-17 14:54:13,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2020-09-17 14:54:13,938 INFO L87 Difference]: Start difference. First operand 57 states and 144 transitions. Second operand 13 states. [2020-09-17 14:54:14,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 14:54:14,420 INFO L93 Difference]: Finished difference Result 75 states and 187 transitions. [2020-09-17 14:54:14,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-17 14:54:14,420 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-09-17 14:54:14,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 14:54:14,421 INFO L225 Difference]: With dead ends: 75 [2020-09-17 14:54:14,422 INFO L226 Difference]: Without dead ends: 63 [2020-09-17 14:54:14,422 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=276, Invalid=594, Unknown=0, NotChecked=0, Total=870 [2020-09-17 14:54:14,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-09-17 14:54:14,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 46. [2020-09-17 14:54:14,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-09-17 14:54:14,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 112 transitions. [2020-09-17 14:54:14,425 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 112 transitions. Word has length 16 [2020-09-17 14:54:14,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 14:54:14,426 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 112 transitions. [2020-09-17 14:54:14,426 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-17 14:54:14,426 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 112 transitions. [2020-09-17 14:54:14,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-17 14:54:14,427 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 14:54:14,427 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 14:54:14,637 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2020-09-17 14:54:14,637 INFO L427 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 14:54:14,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 14:54:14,638 INFO L82 PathProgramCache]: Analyzing trace with hash -1923197356, now seen corresponding path program 20 times [2020-09-17 14:54:14,639 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 14:54:14,639 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [660908904] [2020-09-17 14:54:14,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 14:54:14,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:54:14,783 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:54:14,783 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [660908904] [2020-09-17 14:54:14,784 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1934177747] [2020-09-17 14:54:14,784 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 14:54:14,834 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 14:54:14,834 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 14:54:14,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-09-17 14:54:14,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 14:54:14,851 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:54:14,851 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 14:54:14,851 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-09-17 14:54:14,851 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1141921151] [2020-09-17 14:54:14,852 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 14:54:14,853 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 14:54:14,857 INFO L274 McrAutomatonBuilder]: Finished intersection with 27 states and 37 transitions. [2020-09-17 14:54:14,857 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 14:54:14,858 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:54:14,858 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:54:14,898 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:54:14,898 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:54:14,920 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:54:14,921 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:54:14,929 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:54:14,929 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:54:14,940 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:54:14,941 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:54:14,948 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:54:14,948 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:54:14,974 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:54:14,974 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:54:14,989 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:54:14,989 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:54:14,996 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [4959#(and (<= ~j~0 4) (<= ~i~0 16))] [2020-09-17 14:54:14,996 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-17 14:54:14,997 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 14:54:14,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-17 14:54:14,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2020-09-17 14:54:14,997 INFO L87 Difference]: Start difference. First operand 46 states and 112 transitions. Second operand 14 states. [2020-09-17 14:54:15,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 14:54:15,307 INFO L93 Difference]: Finished difference Result 72 states and 168 transitions. [2020-09-17 14:54:15,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-17 14:54:15,307 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-09-17 14:54:15,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 14:54:15,309 INFO L225 Difference]: With dead ends: 72 [2020-09-17 14:54:15,309 INFO L226 Difference]: Without dead ends: 66 [2020-09-17 14:54:15,310 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 26 SyntacticMatches, 7 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=172, Invalid=428, Unknown=0, NotChecked=0, Total=600 [2020-09-17 14:54:15,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-09-17 14:54:15,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 54. [2020-09-17 14:54:15,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-09-17 14:54:15,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 132 transitions. [2020-09-17 14:54:15,314 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 132 transitions. Word has length 17 [2020-09-17 14:54:15,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 14:54:15,315 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 132 transitions. [2020-09-17 14:54:15,315 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-17 14:54:15,315 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 132 transitions. [2020-09-17 14:54:15,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-17 14:54:15,316 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 14:54:15,316 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 14:54:15,529 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 14:54:15,529 INFO L427 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 14:54:15,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 14:54:15,530 INFO L82 PathProgramCache]: Analyzing trace with hash 949884854, now seen corresponding path program 21 times [2020-09-17 14:54:15,530 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 14:54:15,531 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601656703] [2020-09-17 14:54:15,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 14:54:15,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:54:15,721 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:54:15,722 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601656703] [2020-09-17 14:54:15,722 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [675261697] [2020-09-17 14:54:15,722 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 14:54:15,815 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-09-17 14:54:15,816 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 14:54:15,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-09-17 14:54:15,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 14:54:15,846 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:54:15,847 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 14:54:15,847 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-09-17 14:54:15,847 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [777110430] [2020-09-17 14:54:15,847 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 14:54:15,849 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 14:54:15,853 INFO L274 McrAutomatonBuilder]: Finished intersection with 23 states and 27 transitions. [2020-09-17 14:54:15,853 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 14:54:15,855 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:54:15,856 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:54:15,904 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:54:15,904 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:54:15,918 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [5223#(and (<= ~j~0 6) (<= ~i~0 16))] [2020-09-17 14:54:15,919 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-17 14:54:15,919 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 14:54:15,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-17 14:54:15,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2020-09-17 14:54:15,920 INFO L87 Difference]: Start difference. First operand 54 states and 132 transitions. Second operand 14 states. [2020-09-17 14:54:16,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 14:54:16,402 INFO L93 Difference]: Finished difference Result 92 states and 210 transitions. [2020-09-17 14:54:16,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-17 14:54:16,402 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-09-17 14:54:16,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 14:54:16,403 INFO L225 Difference]: With dead ends: 92 [2020-09-17 14:54:16,403 INFO L226 Difference]: Without dead ends: 86 [2020-09-17 14:54:16,404 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=221, Invalid=591, Unknown=0, NotChecked=0, Total=812 [2020-09-17 14:54:16,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-09-17 14:54:16,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 56. [2020-09-17 14:54:16,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-09-17 14:54:16,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 138 transitions. [2020-09-17 14:54:16,407 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 138 transitions. Word has length 17 [2020-09-17 14:54:16,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 14:54:16,408 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 138 transitions. [2020-09-17 14:54:16,408 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-17 14:54:16,408 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 138 transitions. [2020-09-17 14:54:16,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-17 14:54:16,408 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 14:54:16,409 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 14:54:16,609 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-09-17 14:54:16,610 INFO L427 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 14:54:16,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 14:54:16,610 INFO L82 PathProgramCache]: Analyzing trace with hash -1170028136, now seen corresponding path program 22 times [2020-09-17 14:54:16,611 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 14:54:16,611 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1634808349] [2020-09-17 14:54:16,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 14:54:16,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:54:16,752 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:54:16,752 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1634808349] [2020-09-17 14:54:16,753 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1992860412] [2020-09-17 14:54:16,753 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 14:54:16,810 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 14:54:16,811 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 14:54:16,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-09-17 14:54:16,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 14:54:16,832 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:54:16,832 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 14:54:16,832 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-09-17 14:54:16,833 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [251019968] [2020-09-17 14:54:16,833 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 14:54:16,835 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 14:54:16,838 INFO L274 McrAutomatonBuilder]: Finished intersection with 23 states and 27 transitions. [2020-09-17 14:54:16,838 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 14:54:16,843 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:54:16,844 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:54:16,875 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:54:16,875 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:54:16,884 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [5519#(and (<= ~i~0 16) (<= ~j~0 8))] [2020-09-17 14:54:16,885 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-17 14:54:16,885 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 14:54:16,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-17 14:54:16,886 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2020-09-17 14:54:16,886 INFO L87 Difference]: Start difference. First operand 56 states and 138 transitions. Second operand 14 states. [2020-09-17 14:54:17,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 14:54:17,402 INFO L93 Difference]: Finished difference Result 89 states and 206 transitions. [2020-09-17 14:54:17,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-17 14:54:17,402 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-09-17 14:54:17,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 14:54:17,403 INFO L225 Difference]: With dead ends: 89 [2020-09-17 14:54:17,404 INFO L226 Difference]: Without dead ends: 83 [2020-09-17 14:54:17,404 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=260, Invalid=670, Unknown=0, NotChecked=0, Total=930 [2020-09-17 14:54:17,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-09-17 14:54:17,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 58. [2020-09-17 14:54:17,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-09-17 14:54:17,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 144 transitions. [2020-09-17 14:54:17,409 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 144 transitions. Word has length 17 [2020-09-17 14:54:17,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 14:54:17,409 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 144 transitions. [2020-09-17 14:54:17,409 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-17 14:54:17,409 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 144 transitions. [2020-09-17 14:54:17,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-17 14:54:17,409 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 14:54:17,410 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 14:54:17,611 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-09-17 14:54:17,611 INFO L427 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 14:54:17,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 14:54:17,612 INFO L82 PathProgramCache]: Analyzing trace with hash 1875807226, now seen corresponding path program 23 times [2020-09-17 14:54:17,613 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 14:54:17,613 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [309388032] [2020-09-17 14:54:17,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 14:54:17,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:54:17,736 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:54:17,737 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [309388032] [2020-09-17 14:54:17,737 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1042436365] [2020-09-17 14:54:17,737 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 14:54:17,805 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-09-17 14:54:17,805 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 14:54:17,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-09-17 14:54:17,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 14:54:17,827 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:54:17,828 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 14:54:17,828 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-09-17 14:54:17,828 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1669780155] [2020-09-17 14:54:17,828 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 14:54:17,830 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 14:54:17,833 INFO L274 McrAutomatonBuilder]: Finished intersection with 23 states and 27 transitions. [2020-09-17 14:54:17,834 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 14:54:17,835 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:54:17,835 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:54:17,867 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:54:17,867 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:54:17,878 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [5820#(and (<= ~j~0 10) (<= ~i~0 16))] [2020-09-17 14:54:17,879 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-17 14:54:17,879 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 14:54:17,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-17 14:54:17,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2020-09-17 14:54:17,880 INFO L87 Difference]: Start difference. First operand 58 states and 144 transitions. Second operand 14 states. [2020-09-17 14:54:18,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 14:54:18,393 INFO L93 Difference]: Finished difference Result 89 states and 209 transitions. [2020-09-17 14:54:18,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-09-17 14:54:18,394 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-09-17 14:54:18,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 14:54:18,395 INFO L225 Difference]: With dead ends: 89 [2020-09-17 14:54:18,396 INFO L226 Difference]: Without dead ends: 83 [2020-09-17 14:54:18,397 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=315, Invalid=741, Unknown=0, NotChecked=0, Total=1056 [2020-09-17 14:54:18,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-09-17 14:54:18,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 60. [2020-09-17 14:54:18,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-09-17 14:54:18,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 152 transitions. [2020-09-17 14:54:18,402 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 152 transitions. Word has length 17 [2020-09-17 14:54:18,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 14:54:18,402 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 152 transitions. [2020-09-17 14:54:18,402 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-17 14:54:18,402 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 152 transitions. [2020-09-17 14:54:18,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-17 14:54:18,403 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 14:54:18,403 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 14:54:18,613 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 14:54:18,613 INFO L427 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 14:54:18,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 14:54:18,614 INFO L82 PathProgramCache]: Analyzing trace with hash 1892384476, now seen corresponding path program 24 times [2020-09-17 14:54:18,615 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 14:54:18,615 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [549519888] [2020-09-17 14:54:18,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 14:54:18,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:54:18,769 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:54:18,769 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [549519888] [2020-09-17 14:54:18,770 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1276298362] [2020-09-17 14:54:18,770 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 14:54:18,830 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-09-17 14:54:18,830 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 14:54:18,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-09-17 14:54:18,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 14:54:18,847 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:54:18,847 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 14:54:18,848 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-09-17 14:54:18,848 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [290849859] [2020-09-17 14:54:18,848 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 14:54:18,850 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 14:54:18,853 INFO L274 McrAutomatonBuilder]: Finished intersection with 23 states and 27 transitions. [2020-09-17 14:54:18,853 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 14:54:18,854 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:54:18,855 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:54:18,902 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:54:18,902 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:54:18,912 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [6129#(and (<= ~j~0 12) (<= ~i~0 16))] [2020-09-17 14:54:18,913 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-17 14:54:18,913 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 14:54:18,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-17 14:54:18,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2020-09-17 14:54:18,916 INFO L87 Difference]: Start difference. First operand 60 states and 152 transitions. Second operand 14 states. [2020-09-17 14:54:19,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 14:54:19,530 INFO L93 Difference]: Finished difference Result 90 states and 219 transitions. [2020-09-17 14:54:19,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-17 14:54:19,530 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-09-17 14:54:19,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 14:54:19,531 INFO L225 Difference]: With dead ends: 90 [2020-09-17 14:54:19,531 INFO L226 Difference]: Without dead ends: 78 [2020-09-17 14:54:19,532 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 297 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=384, Invalid=806, Unknown=0, NotChecked=0, Total=1190 [2020-09-17 14:54:19,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-09-17 14:54:19,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 50. [2020-09-17 14:54:19,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-09-17 14:54:19,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 121 transitions. [2020-09-17 14:54:19,535 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 121 transitions. Word has length 17 [2020-09-17 14:54:19,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 14:54:19,535 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 121 transitions. [2020-09-17 14:54:19,535 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-17 14:54:19,535 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 121 transitions. [2020-09-17 14:54:19,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-09-17 14:54:19,537 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 14:54:19,537 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 14:54:19,744 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-09-17 14:54:19,744 INFO L427 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 14:54:19,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 14:54:19,745 INFO L82 PathProgramCache]: Analyzing trace with hash 1171829247, now seen corresponding path program 25 times [2020-09-17 14:54:19,746 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 14:54:19,746 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [912776415] [2020-09-17 14:54:19,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 14:54:19,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:54:19,928 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:54:19,929 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [912776415] [2020-09-17 14:54:19,929 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1805009623] [2020-09-17 14:54:19,929 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 14:54:19,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:54:19,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-09-17 14:54:19,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 14:54:20,013 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:54:20,014 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 14:54:20,014 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-09-17 14:54:20,015 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [122994714] [2020-09-17 14:54:20,015 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 14:54:20,016 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 14:54:20,020 INFO L274 McrAutomatonBuilder]: Finished intersection with 27 states and 34 transitions. [2020-09-17 14:54:20,020 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 14:54:20,025 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:54:20,026 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:54:20,059 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:54:20,059 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:54:20,074 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [6427#(and (<= ~i~0 16) (<= ~j~0 8))] [2020-09-17 14:54:20,075 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-17 14:54:20,075 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 14:54:20,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-17 14:54:20,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2020-09-17 14:54:20,076 INFO L87 Difference]: Start difference. First operand 50 states and 121 transitions. Second operand 15 states. [2020-09-17 14:54:20,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 14:54:20,430 INFO L93 Difference]: Finished difference Result 86 states and 198 transitions. [2020-09-17 14:54:20,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-17 14:54:20,431 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-09-17 14:54:20,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 14:54:20,432 INFO L225 Difference]: With dead ends: 86 [2020-09-17 14:54:20,432 INFO L226 Difference]: Without dead ends: 80 [2020-09-17 14:54:20,433 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=207, Invalid=549, Unknown=0, NotChecked=0, Total=756 [2020-09-17 14:54:20,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-09-17 14:54:20,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 57. [2020-09-17 14:54:20,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-09-17 14:54:20,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 140 transitions. [2020-09-17 14:54:20,435 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 140 transitions. Word has length 18 [2020-09-17 14:54:20,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 14:54:20,436 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 140 transitions. [2020-09-17 14:54:20,436 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-17 14:54:20,436 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 140 transitions. [2020-09-17 14:54:20,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-09-17 14:54:20,436 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 14:54:20,436 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 14:54:20,638 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 14:54:20,639 INFO L427 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 14:54:20,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 14:54:20,639 INFO L82 PathProgramCache]: Analyzing trace with hash -250055839, now seen corresponding path program 26 times [2020-09-17 14:54:20,640 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 14:54:20,640 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2071208144] [2020-09-17 14:54:20,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 14:54:20,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:54:20,785 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:54:20,785 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2071208144] [2020-09-17 14:54:20,785 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [849463711] [2020-09-17 14:54:20,785 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 14:54:20,862 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 14:54:20,862 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 14:54:20,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-09-17 14:54:20,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 14:54:20,884 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:54:20,884 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 14:54:20,885 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-09-17 14:54:20,885 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [22867816] [2020-09-17 14:54:20,885 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 14:54:20,888 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 14:54:20,894 INFO L274 McrAutomatonBuilder]: Finished intersection with 26 states and 32 transitions. [2020-09-17 14:54:20,894 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 14:54:20,901 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:54:20,901 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:54:20,948 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:54:20,949 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:54:20,965 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [6719#(and (<= ~j~0 10) (<= ~i~0 16))] [2020-09-17 14:54:20,965 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-17 14:54:20,966 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 14:54:20,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-17 14:54:20,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2020-09-17 14:54:20,967 INFO L87 Difference]: Start difference. First operand 57 states and 140 transitions. Second operand 15 states. [2020-09-17 14:54:21,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 14:54:21,413 INFO L93 Difference]: Finished difference Result 83 states and 194 transitions. [2020-09-17 14:54:21,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-17 14:54:21,414 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-09-17 14:54:21,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 14:54:21,414 INFO L225 Difference]: With dead ends: 83 [2020-09-17 14:54:21,414 INFO L226 Difference]: Without dead ends: 77 [2020-09-17 14:54:21,415 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=231, Invalid=639, Unknown=0, NotChecked=0, Total=870 [2020-09-17 14:54:21,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-09-17 14:54:21,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 59. [2020-09-17 14:54:21,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-09-17 14:54:21,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 146 transitions. [2020-09-17 14:54:21,417 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 146 transitions. Word has length 18 [2020-09-17 14:54:21,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 14:54:21,417 INFO L479 AbstractCegarLoop]: Abstraction has 59 states and 146 transitions. [2020-09-17 14:54:21,417 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-17 14:54:21,417 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 146 transitions. [2020-09-17 14:54:21,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-09-17 14:54:21,418 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 14:54:21,418 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 14:54:21,618 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-09-17 14:54:21,619 INFO L427 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 14:54:21,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 14:54:21,619 INFO L82 PathProgramCache]: Analyzing trace with hash 1924998467, now seen corresponding path program 27 times [2020-09-17 14:54:21,620 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 14:54:21,620 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1034723336] [2020-09-17 14:54:21,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 14:54:21,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:54:21,757 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:54:21,758 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1034723336] [2020-09-17 14:54:21,758 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1793071743] [2020-09-17 14:54:21,758 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 14:54:21,814 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-09-17 14:54:21,814 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 14:54:21,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-09-17 14:54:21,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 14:54:21,837 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:54:21,837 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 14:54:21,837 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-09-17 14:54:21,838 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [588535499] [2020-09-17 14:54:21,838 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 14:54:21,840 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 14:54:21,843 INFO L274 McrAutomatonBuilder]: Finished intersection with 26 states and 32 transitions. [2020-09-17 14:54:21,844 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 14:54:21,845 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:54:21,845 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:54:21,880 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:54:21,881 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:54:21,893 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [7016#(and (<= ~j~0 12) (<= ~i~0 16))] [2020-09-17 14:54:21,893 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-17 14:54:21,893 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 14:54:21,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-17 14:54:21,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2020-09-17 14:54:21,894 INFO L87 Difference]: Start difference. First operand 59 states and 146 transitions. Second operand 15 states. [2020-09-17 14:54:22,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 14:54:22,495 INFO L93 Difference]: Finished difference Result 81 states and 192 transitions. [2020-09-17 14:54:22,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-17 14:54:22,496 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-09-17 14:54:22,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 14:54:22,498 INFO L225 Difference]: With dead ends: 81 [2020-09-17 14:54:22,498 INFO L226 Difference]: Without dead ends: 75 [2020-09-17 14:54:22,499 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=271, Invalid=721, Unknown=0, NotChecked=0, Total=992 [2020-09-17 14:54:22,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-09-17 14:54:22,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 61. [2020-09-17 14:54:22,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-09-17 14:54:22,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 152 transitions. [2020-09-17 14:54:22,506 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 152 transitions. Word has length 18 [2020-09-17 14:54:22,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 14:54:22,507 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 152 transitions. [2020-09-17 14:54:22,507 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-17 14:54:22,507 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 152 transitions. [2020-09-17 14:54:22,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-09-17 14:54:22,508 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 14:54:22,508 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 14:54:22,721 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-09-17 14:54:22,721 INFO L427 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 14:54:22,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 14:54:22,722 INFO L82 PathProgramCache]: Analyzing trace with hash 675866533, now seen corresponding path program 28 times [2020-09-17 14:54:22,722 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 14:54:22,723 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [831267763] [2020-09-17 14:54:22,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 14:54:22,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:54:22,902 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:54:22,902 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [831267763] [2020-09-17 14:54:22,902 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1799137277] [2020-09-17 14:54:22,903 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 14:54:22,965 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 14:54:22,966 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 14:54:22,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-09-17 14:54:22,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 14:54:22,985 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:54:22,985 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 14:54:22,986 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-09-17 14:54:22,987 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [950257438] [2020-09-17 14:54:22,987 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 14:54:22,990 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 14:54:22,994 INFO L274 McrAutomatonBuilder]: Finished intersection with 26 states and 32 transitions. [2020-09-17 14:54:22,994 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 14:54:22,995 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:54:22,996 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:54:23,043 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:54:23,043 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:54:23,072 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [7319#(and (<= ~j~0 14) (<= ~i~0 16))] [2020-09-17 14:54:23,072 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-17 14:54:23,072 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 14:54:23,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-17 14:54:23,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2020-09-17 14:54:23,073 INFO L87 Difference]: Start difference. First operand 61 states and 152 transitions. Second operand 15 states. [2020-09-17 14:54:23,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 14:54:23,694 INFO L93 Difference]: Finished difference Result 81 states and 195 transitions. [2020-09-17 14:54:23,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-09-17 14:54:23,701 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-09-17 14:54:23,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 14:54:23,702 INFO L225 Difference]: With dead ends: 81 [2020-09-17 14:54:23,702 INFO L226 Difference]: Without dead ends: 75 [2020-09-17 14:54:23,703 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 256 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=327, Invalid=795, Unknown=0, NotChecked=0, Total=1122 [2020-09-17 14:54:23,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-09-17 14:54:23,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 63. [2020-09-17 14:54:23,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-09-17 14:54:23,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 160 transitions. [2020-09-17 14:54:23,706 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 160 transitions. Word has length 18 [2020-09-17 14:54:23,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 14:54:23,707 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 160 transitions. [2020-09-17 14:54:23,707 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-17 14:54:23,707 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 160 transitions. [2020-09-17 14:54:23,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-09-17 14:54:23,707 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 14:54:23,707 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 14:54:23,918 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,28 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 14:54:23,918 INFO L427 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 14:54:23,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 14:54:23,919 INFO L82 PathProgramCache]: Analyzing trace with hash 692443783, now seen corresponding path program 29 times [2020-09-17 14:54:23,920 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 14:54:23,920 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [5217471] [2020-09-17 14:54:23,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 14:54:23,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:54:24,073 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:54:24,074 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [5217471] [2020-09-17 14:54:24,074 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [326080589] [2020-09-17 14:54:24,074 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 14:54:24,133 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-09-17 14:54:24,133 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 14:54:24,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-09-17 14:54:24,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 14:54:24,161 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:54:24,162 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 14:54:24,162 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-09-17 14:54:24,162 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1875602644] [2020-09-17 14:54:24,162 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 14:54:24,165 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 14:54:24,169 INFO L274 McrAutomatonBuilder]: Finished intersection with 26 states and 32 transitions. [2020-09-17 14:54:24,169 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 14:54:24,170 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:54:24,170 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:54:24,206 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:54:24,206 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:54:24,218 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [7630#(and (<= ~j~0 16) (<= ~i~0 16))] [2020-09-17 14:54:24,219 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-17 14:54:24,219 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 14:54:24,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-17 14:54:24,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2020-09-17 14:54:24,220 INFO L87 Difference]: Start difference. First operand 63 states and 160 transitions. Second operand 15 states. [2020-09-17 14:54:24,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 14:54:24,853 INFO L93 Difference]: Finished difference Result 79 states and 195 transitions. [2020-09-17 14:54:24,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-09-17 14:54:24,858 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-09-17 14:54:24,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 14:54:24,859 INFO L225 Difference]: With dead ends: 79 [2020-09-17 14:54:24,859 INFO L226 Difference]: Without dead ends: 70 [2020-09-17 14:54:24,860 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=383, Invalid=807, Unknown=0, NotChecked=0, Total=1190 [2020-09-17 14:54:24,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-09-17 14:54:24,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 64. [2020-09-17 14:54:24,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-09-17 14:54:24,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 161 transitions. [2020-09-17 14:54:24,863 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 161 transitions. Word has length 18 [2020-09-17 14:54:24,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 14:54:24,863 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 161 transitions. [2020-09-17 14:54:24,863 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-17 14:54:24,864 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 161 transitions. [2020-09-17 14:54:24,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-09-17 14:54:24,864 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 14:54:24,864 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 14:54:25,074 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 14:54:25,074 INFO L427 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 14:54:25,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 14:54:25,075 INFO L82 PathProgramCache]: Analyzing trace with hash -8543960, now seen corresponding path program 30 times [2020-09-17 14:54:25,075 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 14:54:25,075 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482205527] [2020-09-17 14:54:25,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 14:54:25,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:54:25,180 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 20 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:54:25,180 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482205527] [2020-09-17 14:54:25,181 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1237905549] [2020-09-17 14:54:25,181 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 14:54:25,250 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2020-09-17 14:54:25,251 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 14:54:25,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 7 conjunts are in the unsatisfiable core [2020-09-17 14:54:25,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 14:54:25,269 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:54:25,269 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-09-17 14:54:25,270 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 9 [2020-09-17 14:54:25,270 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [997641881] [2020-09-17 14:54:25,270 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 14:54:25,272 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 14:54:25,277 INFO L274 McrAutomatonBuilder]: Finished intersection with 26 states and 31 transitions. [2020-09-17 14:54:25,277 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 14:54:25,313 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-09-17 14:54:25,314 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-17 14:54:25,314 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 14:54:25,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-17 14:54:25,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2020-09-17 14:54:25,315 INFO L87 Difference]: Start difference. First operand 64 states and 161 transitions. Second operand 8 states. [2020-09-17 14:54:25,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 14:54:25,334 INFO L93 Difference]: Finished difference Result 151 states and 338 transitions. [2020-09-17 14:54:25,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-17 14:54:25,334 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 19 [2020-09-17 14:54:25,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 14:54:25,335 INFO L225 Difference]: With dead ends: 151 [2020-09-17 14:54:25,335 INFO L226 Difference]: Without dead ends: 50 [2020-09-17 14:54:25,338 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2020-09-17 14:54:25,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-09-17 14:54:25,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2020-09-17 14:54:25,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-09-17 14:54:25,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 100 transitions. [2020-09-17 14:54:25,342 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 100 transitions. Word has length 19 [2020-09-17 14:54:25,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 14:54:25,343 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 100 transitions. [2020-09-17 14:54:25,343 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-17 14:54:25,343 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 100 transitions. [2020-09-17 14:54:25,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-09-17 14:54:25,344 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 14:54:25,344 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 14:54:25,554 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2020-09-17 14:54:25,554 INFO L427 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 14:54:25,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 14:54:25,555 INFO L82 PathProgramCache]: Analyzing trace with hash -1356705901, now seen corresponding path program 31 times [2020-09-17 14:54:25,555 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 14:54:25,555 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2129098920] [2020-09-17 14:54:25,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 14:54:25,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:54:25,641 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 20 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:54:25,642 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2129098920] [2020-09-17 14:54:25,642 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [552759595] [2020-09-17 14:54:25,642 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 14:54:25,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:54:25,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 7 conjunts are in the unsatisfiable core [2020-09-17 14:54:25,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 14:54:25,714 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:54:25,715 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-09-17 14:54:25,715 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 9 [2020-09-17 14:54:25,715 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [589159720] [2020-09-17 14:54:25,715 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 14:54:25,717 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 14:54:25,722 INFO L274 McrAutomatonBuilder]: Finished intersection with 29 states and 39 transitions. [2020-09-17 14:54:25,722 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 14:54:25,752 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-09-17 14:54:25,753 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-17 14:54:25,753 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 14:54:25,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-17 14:54:25,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2020-09-17 14:54:25,754 INFO L87 Difference]: Start difference. First operand 50 states and 100 transitions. Second operand 8 states. [2020-09-17 14:54:25,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 14:54:25,766 INFO L93 Difference]: Finished difference Result 86 states and 150 transitions. [2020-09-17 14:54:25,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-17 14:54:25,767 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 19 [2020-09-17 14:54:25,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 14:54:25,767 INFO L225 Difference]: With dead ends: 86 [2020-09-17 14:54:25,768 INFO L226 Difference]: Without dead ends: 0 [2020-09-17 14:54:25,768 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2020-09-17 14:54:25,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-09-17 14:54:25,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-09-17 14:54:25,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-09-17 14:54:25,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-09-17 14:54:25,769 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 19 [2020-09-17 14:54:25,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 14:54:25,769 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-09-17 14:54:25,770 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-17 14:54:25,770 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-09-17 14:54:25,770 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-09-17 14:54:25,976 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 14:54:25,982 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 17.09 02:54:25 BasicIcfg [2020-09-17 14:54:25,983 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-17 14:54:25,985 INFO L168 Benchmark]: Toolchain (without parser) took 30526.52 ms. Allocated memory was 138.4 MB in the beginning and 440.9 MB in the end (delta: 302.5 MB). Free memory was 99.1 MB in the beginning and 208.1 MB in the end (delta: -109.0 MB). Peak memory consumption was 193.5 MB. Max. memory is 7.1 GB. [2020-09-17 14:54:25,986 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 138.4 MB. Free memory was 118.7 MB in the beginning and 118.5 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. [2020-09-17 14:54:25,986 INFO L168 Benchmark]: CACSL2BoogieTranslator took 852.06 ms. Allocated memory was 138.4 MB in the beginning and 200.8 MB in the end (delta: 62.4 MB). Free memory was 98.4 MB in the beginning and 158.3 MB in the end (delta: -59.9 MB). Peak memory consumption was 22.4 MB. Max. memory is 7.1 GB. [2020-09-17 14:54:25,987 INFO L168 Benchmark]: Boogie Procedure Inliner took 60.30 ms. Allocated memory is still 200.8 MB. Free memory was 158.3 MB in the beginning and 156.3 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 7.1 GB. [2020-09-17 14:54:25,987 INFO L168 Benchmark]: Boogie Preprocessor took 38.71 ms. Allocated memory is still 200.8 MB. Free memory was 156.3 MB in the beginning and 154.9 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. [2020-09-17 14:54:25,988 INFO L168 Benchmark]: RCFGBuilder took 471.90 ms. Allocated memory is still 200.8 MB. Free memory was 154.9 MB in the beginning and 134.4 MB in the end (delta: 20.6 MB). Peak memory consumption was 20.6 MB. Max. memory is 7.1 GB. [2020-09-17 14:54:25,988 INFO L168 Benchmark]: TraceAbstraction took 29091.39 ms. Allocated memory was 200.8 MB in the beginning and 440.9 MB in the end (delta: 240.1 MB). Free memory was 133.7 MB in the beginning and 208.1 MB in the end (delta: -74.4 MB). Peak memory consumption was 165.7 MB. Max. memory is 7.1 GB. [2020-09-17 14:54:25,991 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 138.4 MB. Free memory was 118.7 MB in the beginning and 118.5 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 852.06 ms. Allocated memory was 138.4 MB in the beginning and 200.8 MB in the end (delta: 62.4 MB). Free memory was 98.4 MB in the beginning and 158.3 MB in the end (delta: -59.9 MB). Peak memory consumption was 22.4 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 60.30 ms. Allocated memory is still 200.8 MB. Free memory was 158.3 MB in the beginning and 156.3 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 38.71 ms. Allocated memory is still 200.8 MB. Free memory was 156.3 MB in the beginning and 154.9 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 471.90 ms. Allocated memory is still 200.8 MB. Free memory was 154.9 MB in the beginning and 134.4 MB in the end (delta: 20.6 MB). Peak memory consumption was 20.6 MB. Max. memory is 7.1 GB. * TraceAbstraction took 29091.39 ms. Allocated memory was 200.8 MB in the beginning and 440.9 MB in the end (delta: 240.1 MB). Free memory was 133.7 MB in the beginning and 208.1 MB in the end (delta: -74.4 MB). Peak memory consumption was 165.7 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks LbeTime: 1.4s, 57 ProgramPointsBefore, 20 ProgramPointsAfterwards, 55 TransitionsBefore, 15 TransitionsAfterwards, 924 CoEnabledTransitionPairs, 6 FixpointIterations, 12 TrivialSequentialCompositions, 25 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 5 ConcurrentYvCompositions, 3 ChoiceCompositions, 486 VarBasedMoverChecksPositive, 13 VarBasedMoverChecksNegative, 0 SemBasedMoverChecksPositive, 0 SemBasedMoverChecksNegative, 0 SemBasedMoverChecksUnknown, SemBasedMoverCheckTime: 0.0s, 0 MoverChecksTotal, 851 CheckedPairsTotal, 42 TotalNumberOfCompositions - PositiveResult [Line: 703]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 51 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 28.9s, OverallIterations: 33, TraceHistogramMax: 6, AutomataDifference: 11.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 1.4s, HoareTripleCheckerStatistics: 504 SDtfs, 1406 SDslu, 2052 SDs, 0 SdLazy, 2172 SolverSat, 1086 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1498 GetRequests, 753 SyntacticMatches, 57 SemanticMatches, 688 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3762 ImplicationChecksByTransitivity, 10.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=64occurred in iteration=31, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 33 MinimizatonAttempts, 490 StatesRemovedByMinimization, 30 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 0.9s SatisfiabilityAnalysisTime, 4.4s InterpolantComputationTime, 952 NumberOfCodeBlocks, 952 NumberOfCodeBlocksAsserted, 118 NumberOfCheckSat, 889 ConstructedInterpolants, 0 QuantifiedInterpolants, 54597 SizeOfPredicates, 202 NumberOfNonLiveVariables, 3040 ConjunctsInSsa, 328 ConjunctsInUnsatCore, 63 InterpolantComputations, 5 PerfectInterpolantSequences, 90/700 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...